Eastern Fence Lizard

The Eastern Fence Lizard, Sceloporus undulatus, is a medium sized lizard found along forest edges, rock piles, and rotting logs or stumps. They are found from southwestern Canada in the province of British Columbia, across the Great Plains of the eastern United States, south to northern Mexico. They are sometimes known as the Prairie Lizard or Gray Lizard.

The fence lizard can grow from 4 to 7.25 inches long. It is typically colored in shades of grey or brown, and has keeled scales, with a dark line running along the rear of the thigh. Females are usually gray and have a series of dark, wavy lines across their back. Their belly is white with black flecks, and they have some pale blue on their throat and belly. Males are usually brown and during the summer they have a lot more greenish-blue and black coloration on the sides of the belly and throat than the female has. The young look like the females, but are darker and duller.

Fence lizards are diurnal and spend much of their time basking. Their diet consists of primarily insects and spiders. When surprised, they often will dash for a nearby tree, climb up a short distance, and then hide on the opposite side of the trunk, moving around to stay on the opposite side if approached. They mate in spring, and lay 3-16 eggs in late spring or early summer. The young hatch in summer and fall.